Well that's not quite right is it....
If you wanted to know everything about a NASCAR or F1 car, who would you ask? The driver or the crew who built it?
If I want to know what kind of car to buy I'm not going to talk to a guy who drives a Honda. All he knows is his Honda.
I can guarantee you, because I see it every day, the guy who sells and builds these things knows far more about them than the people who buy them. We are the guys who fix them when they break, answer questions when they malfunction, have to know how dozens of different weapons operate, know the good from the bad, the ammo, the accessories. I handle and discuss rifles, pistols, and shotguns every single day, 40+ hours a week. Not to mention hours of dry fire and live fire practice every week for 3 gun, USPSA, and LRTR.
Just squeezing a trigger on a range is easy in comparison.